@better-auth/sso: SSO provider may allow registration for any org member without a checking their role

Description

You are affected if all of the following are true:

• You depend on @better-auth/sso at any version in >= 1.2.10, < 1.6.11, or any current next pre-release.
• You enable both sso() and organization() plugins.
• providersLimit is at its default (10) or any non-zero value, so SSO provider registration is enabled for authenticated users.

Recommendation

Update the @better-auth/sso package to the latest compatible version. Followings are version details:

• Affected version(s): >= 1.2.10, < 1.6.11
• Patched version(s): 1.6.11

References

• GHSA-gv74-j8m3-fg5f
• CVE-2026-53515
• CWE-269
• CWE-285
• CWE-863
• CAPEC-310
• OWASP 2021-A1
• OWASP 2021-A4
• OWASP 2021-A6

Related Issues

• @better-auth/sso provider registration has server-side request forgery via unvalidated OIDC endpoints - CVE-2026-53513
• OneUpTime's Unsandboxed Code Execution in Probe Allows Any Project Member to Achieve RCE - CVE-2026-30887
• Backstage: Catalog unprocessed read endpoints allow authenticated cross-owner data access without permission checks - CVE-2026-44374
• Backstage: Catalog unprocessed read endpoints allow authenticated cross-owner data access without permission checks - @backstage/plugin-catalog-unprocessed-entities-common - CVE-2026-44374

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Tags:

npm

@better-auth/sso